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  <title>Open gz-file</title>
 </head>
 <body class="docs"><div id="layout">
  <div id="layout-content"><div id="function.gzopen" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">gzopen</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">gzopen</span> &mdash; <span class="dc-title">Open gz-file</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.gzopen-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>gzopen</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
   , <span class="methodparam"><span class="type">string</span> <code class="parameter">$mode</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$use_include_path</code><span class="initializer"> = 0</span></span>
  ] ) : <span class="type">resource</span></div>

  <p class="para rdfs-comment">
   Opens a gzip (.gz) file for reading or writing. 
  </p>
  <p class="para">
   <span class="function"><strong>gzopen()</strong></span> can be used to read a file which is
   not in gzip format; in this case <span class="function"><a href="gzread.html" class="function">gzread()</a></span> will
   directly read from the file without decompression.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.gzopen-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">filename</code></dt>

     <dd>

      <p class="para">
       The file name.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">mode</code></dt>

     <dd>

      <p class="para">
       As in <span class="function"><a href="fopen.html" class="function">fopen()</a></span> (<em>rb</em> or 
       <em>wb</em>) but can also include a compression level 
       (<em>wb9</em>) or a strategy: <em>f</em> for
       filtered data as in <em>wb6f</em>, <em>h</em> for
       <em>Huffman only compression</em> as in <em>wb1h</em>.
       (See the description of <em>deflateInit2</em>
       in <var class="filename">zlib.h</var> for 
       more information about the strategy parameter.)
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">use_include_path</code></dt>

     <dd>

      <p class="para">
       You can set this optional parameter to <em>1</em>, if you
       want to search for the file in the <a href="ini.core.html#ini.include-path" class="link">include_path</a> too.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.gzopen-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns a file pointer to the file opened, after that, everything you read
   from this file descriptor will be transparently decompressed and what you 
   write gets compressed.
  </p>
  <p class="para">
   If the open fails, the function returns <strong><code>FALSE</code></strong>.
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.gzopen-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-878">
    <p><strong>Example #1 <span class="function"><strong>gzopen()</strong></span> Example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$fp&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">gzopen</span><span style="color: #007700">(</span><span style="color: #DD0000">"/tmp/file.gz"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"r"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.gzopen-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="gzclose.html" class="function" rel="rdfs-seeAlso">gzclose()</a> - Close an open gz-file pointer</span></li>
   </ul>
  </p>
 </div>

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